Publication

Cramer-Rao Bounds for Channel Estimation and Source Localization in Wireless Communications

2001
Conference Papers

Abstract

With the convergence of internet and wireless communications, a plethora of new services will originate. A natural application for cellular radio networks is that of radiolocation, in which the mobile unit can be positioned based on the signals received at several base stations. In this paper, we derive the Cramer-Rao bound (CRB), which serves as an optimality criterion, for the estimation of channel parameters and source localization in time division multiple access (TDMA) mobile radio systems operating over multipath fading channels. The CRB for the mobile’s position that we obtain do not assume any particular trilateration method, and is expressed as a function of the line-of-sight (LOS) signal parameters that are estimated at one or more base station (BS) equipped of cluster of antennas with arbitrary directional characteristics. As an application example, we study the achievable positioning accuracy and the effects of local scattering for a typical global system for mobile communications (GSM) digital cellular system.

Official source

https://infoscience.epfl.ch/entities/publication/69689dbb-8f6c-44a8-a2a9-9c5b3588d9ce

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2001
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/69689dbb-8f6c-44a8-a2a9-9c5b3588d9ce

About this result

Related concepts (32)

Base station

Base station (or base radio station) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a "land station in the land mobile service." The term is used in the context of mobile telephony, wireless computer networking and other wireless communications and in land surveying. In surveying, it is a GPS receiver at a known position, while in wireless communications it is a transceiver connecting a number of other devices to one another and/or to a wider area.

Mobile phone

A mobile phone (or cellphone) is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone (landline phone). The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular network architecture and therefore mobile telephones are called cellphones (or "cell phones") in North America.

Indoor positioning system

An indoor positioning system (IPS) is a network of devices used to locate people or objects where GPS and other satellite technologies lack precision or fail entirely, such as inside multistory buildings, airports, alleys, parking garages, and underground locations. A large variety of techniques and devices are used to provide indoor positioning ranging from reconfigured devices already deployed such as smartphones, WiFi and Bluetooth antennas, digital cameras, and clocks; to purpose built installations with relays and beacons strategically placed throughout a defined space.

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Cramer-Rao Bounds for Channel Estimation and Source Localization in Wireless Communications

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